<template>
  <div class="login_container">
    <el-row>
      <el-col :span="12" :xs="0"></el-col>
      <el-col :span="12" :xs="24">
        <!-- 登录的表单 -->
        <el-form class="login_form" :model="loginForm" :rules="rules" ref="loginForms">
          <h1>Hello</h1>
          <h2>欢迎来到硅谷甄选</h2>
          <el-form-item prop="username">
            <el-input :prefix-icon="User" v-model="loginForm.username"></el-input>
          </el-form-item>
          <el-form-item prop="password">
            <el-input type="password" :prefix-icon="Lock" v-model="loginForm.password" show-password></el-input>
          </el-form-item>
          <el-form-item>
            <el-button :loading="loading" class="login_btn" type="primary" size="default" @click="login"> 登录 </el-button>
          </el-form-item>
        </el-form>
      </el-col>
    </el-row>
  </div>
</template>

<script setup lang="ts">
import { reactive, ref } from 'vue'
//引入icon
import { User, Lock } from '@element-plus/icons-vue'
//引入用户相关的小仓库
import useUserStore from '@/store/modules/user.ts'
//引入路由
import { useRouter, useRoute } from 'vue-router'
import { ElNotification } from 'element-plus'
//引入时间
import { getTime } from '@/utils/time'
//获取路由器
let $router = useRouter()
//路由对象
let $route = useRoute()
let useStore = useUserStore()
let loginForm = reactive({ username: 'admin', password: 'atguigu123' })
//获取el-form组件
let loginForms = ref()
//定义变量控制按钮加载效果
let loading = ref(false)
//点击登录按钮
let login = async () => {
  //保证全部表单校验通过才能发请求
  await loginForms.value.validate()
  loading.value = true //加载效果:开始加载
  try {
    //保证登录成功
    await useStore.userLogin(loginForm)
    let redirect: any = $route.query.redirect
    //编程式导航跳转到展示数据首页
    //判断登录的时候,路由路径当中是否有query参数，如果有就往query参数挑战，没有跳转到首页
    $router.push({ path: redirect || '/' })
    //登录成功的提示信息
    ElNotification({
      type: 'success',
      message: '欢迎回来',
      title: `HI,${getTime()}好`
    })
    loading.value = false //登录成功加载效果也消失
  } catch (error) {
    loading.value = false //登录失败加载效果消息
    //登录失败的提示信息
    ElNotification({
      type: 'error',
      message: (error as Error).message
    })
  }
}
//定义自定义校验规则
const validateUsername = (_rule: any, value: any, callback: any) => {
  if (value.length >= 5) {
    callback()
  } else {
    callback(new Error('账号长度至少五位'))
  }
}
const validatePassword = (_rule: any, value: any, callback: any) => {
  if (value.length >= 6) {
    callback()
  } else {
    callback(new Error('密码长度至少6位'))
  }
}
//定义表单校验规则
const rules = {
  username: [
    {
      trigger: 'change',
      validator: validateUsername
    }
  ],
  password: [
    {
      trigger: 'change',
      validator: validatePassword
    }
  ]
}
</script>

<style scoped lang="scss">
.login_container {
  width: 100%;
  height: 100vh;
  background: url('@/assets/images/background.jpg') no-repeat;
  background-size: cover;
  .login_form {
    position: relative;
    width: 80%;
    top: 30vh;
    background: url('@/assets/images/login_form.png') no-repeat;
    background-size: cover;
    padding: 40px;
    h1 {
      color: white;
      font-size: 40px;
    }
    h2 {
      font-size: 20px;
      color: white;
      margin: 20px 0px;
    }
    .login_btn {
      width: 100%;
    }
  }
}
</style>
